A coral reef grew 20.2mm taller. How much did it grow in meters?

Growth of coral reef in meters = 0.0202 m = 2.02 x 10⁻²m

Explanation:

1 meter = 100 cm

1 cm = 10 millimeter

1 meter = 100 x 10 = 1000 millimeter.

1 millimeter = 1/1000 = 0.001 meter.

A coral reef grew 20.2mm taller = 20.2 x 0.001 m

= 0.0202 m

Growth of coral reef in meters = 0.0202 m = 2.02 x 10⁻²m